Alarm control

ABSTRACT

An alarm control system has an internal receiver module and an internal ultrasonic intruder detector module connected to one input channel of a bistable flip-flop. An internal heat sensor fire detector is connected to another input channel. Remote inputs are connectable to either input channel. Inputs in the first channel cause the flip-flop to change to the alarm state and to operate a relay driver which partially completes AC outlet relays and remote output relays and which starts an adjustable delay timer to operate a second relay driver for partially completing a horn relay and for partially completing a circuit to a reset delay device. A function selector selectively grounds one or more of the output relays preparatory to operation of the flip-flop and relay drivers so that the circuits are ready to operate the appropriate output when the flip-flop is biased into an alarm state. The second channel is connected directly to the second relay driver and to the function selector for overriding the function selector for grounding all relay coils so that all signals operate when an extremely hazardous condition such as fire is sensed by second channel sensors.

ass sR 39 27M? [72] Inventors Charles H. Peterson; 3,401,234 9/1968Heald 340/213 X Kruger bow of San Dlego Primary Examiner-John W.Caldwell Assistant Examiner-Perry Palan [21] Appl. No. 814,537 [22]Filed Apr. 9, 1969 Attorney-Lrttlepage, Quaintance, Wray & Alsenberg[45] Patented Oct. 12, 1971 [73] Assignee Defensive Instruments,1nc.

Plttsburgh ABSTRACT: An alarm control system has an internal receivermodule and an internal ultrasonic intruder detector module [54] ALARMCONTROL connected to one input channel of a bistable flip-flophAnintemal heat sensor fire detector is connected to another Input 18Claims, 2 Drawing Figs. A

channel. Remote Inputs are connectable to either input chan- U.S. nelInputs in the first channel cause the to change to 340/213 340/326,340/371, 340/420 the alarm state and to operate a relay driver whichpartially ll Int. Cl 7/00, com letes AC outlet relays and remote outputrelays and G08b13/0O which starts an adjustable delay timer to operate asecond Field 01 swrch relay driver for completing a horn relay and forpar. 420, 326, 213-1; 317/137 tially completing a circuit to a resetdelay device. A function 1 selector selectively grounds one or more ofthe output relays [56] Reirences cued preparatory to operation of theflip-flop and relay drivers so UNITED STATES PATENTS that the circuitsare ready to operate the appropriate output 2,703,367 3/1955 Florman340/371 X when the flip-flop is biased into an alarm state. The second3,200,393 3/1965 340/420 X channel is connected directly to the secondrelay driver and to 3,212,079 1 5 340/213.] the function selector foroverriding the function selector for 3,257,653 1966 340/224 groundingall relay coils so that all signals operate when an ex 3,260,991 7/1966Laakmann 340/258 UX tremely hazardous condition such as fire is sensedby second 3,380,044 4/1968 Mordwinkin 340/258 channel sensors.

. [9 REMOTE 6A REMOTE INPUT RELAY AC OUTLET AccEssORIEs DRIVER RELAYPRE-SET 57A INTERNAL [IO- REMOTE 2335 RECEIVER OUTLET A RF MODULE FL'PFLOP RELAY K-L-M 5 H REsET MOVING INTERNAL 46 OBJECT ULTRASONIC WDETECTION MODULE r43 P-Q-R ADJUSTABLE RESET DELAY INTERNAL DELAY 5 SEC.HEAT l HEAT sENsoR 32-4l REMOTE ital J RELAY HORN CE 0 5 AC RIE INSTANTDRIVER RELAY "7 VAC ENABLE ALL I AC POWER FUNCTIONS FUNC'HON 2 Ac 8 HORN|NPUT SELECTOR 3-AC, HORN, REA

4-REMOTE PAIENTEBIIU I2 I971 REMOTE ACCESSORIES REMOTE TRANSMTTTERMOVING OBJECT DETECTION HEAT REMOTE ACCESSORIES ll? VAC POWER INPUTSHEET 16F 2 [9 6A REMOTE RELAY AC OUTLET INPUT DRIvER RELAY PRE-sETINTERNAL [IO-2O REMOTE REcEIvER r OUTLET A RF MODULE RELAY FLIP-FL0P\KLM T RESET INTERNAL J ULTRAsONIc 1 SW MODULE f 30 43 45 P-Q-R IIADJUSTABLE RESET DELAY INTERNAL DELAY TIMER 5 SEC.

HEAT A sENsOR Luv 36A I1 REMOTE RELA O N INPUT Y 7 H R DRIVER RELAYINsTANT [SI-69 I [50 ENABLE ALL I AC POWER FUNCTIONS FUNCTION 2* Ac 8HORN J SUPPLY SELECTOR 3AC,AHORN,REM

4-REMOTE F/G. I INVENTORS C. H. PETERSON CURTISS C. KRUEGER May,

ALARM CONTROL BACKGROUND OF THE INVENTION The need for improved fire andburglar alarms is well recognized. l-leretofore, compact plug-inequipment, which requires no special installation and which is containedin a single small self-sufficient package, has been unavailable.Moreover, combined burglar alarm and fire alarm control equipment whicheffects a time delay control for the burglar alarm and immediateresponse for fire alarms is not known The present apparatus acceptsradio signals, detects motion and senses heat and controls an alarmresponse in a completely effective selfcontained system without the useof accessory equipment. However, accessory alarm sensors or remote alarmindicating systems can be connected to the present system to furtherextend its effectiveness and versatility. The present system, inresponse to remote radio transmitters or remote electrically connecteddevices, responds with time delayed local signals and the completing ofpower connections for remote signalling devices.

Most systems of conventional design connect relay control circuitsdirectly to various alarm sensors. Because it is desirable to provide alatching function so that once the alarm is actuated it remains actuateduntil intentionally reset, many of the latching relays that arecommercially available are very complex mechanically and are highlyunreliable.

Timing circuits heretofore available have experienced difficulty inproviding an adjustable range ratio as high as the present circuit whilemaintaining a linear time scale on the time delay adjustment control.Time delay controls such as in the present invention in which the timedelay circuit resets itself instantaneously and can immediately resumethe timing cycle with a very small amount of error have heretofore beenunavailable.

Multiple function selection switches of conventional design requirecomplex multiple-pole selector switches. The present invention avoidsthe use of such devices by an unusual arrangement of diodes and a singlepole switch.

One very real danger in the successful use of intruder alarms,particularly, is the danger that the intruder will disconnect the alarmor disable the alarm such as by depressing the reset button andresetting the equipment to a no alarm condition. The present apparatusovercomes that possibility by adding a time delay to the reset equipmentso that an alarm output will occur for at least 5 seconds for anytrigger caused by any sensor before the equipment is reset to a no alarmcondition.

SUMMARY OF THE INVENTION The alarm control module receives signals froma multitude of internal or remotely located sensors and provides logicand timing functions so that an appropriate alarm indicating device isactuated. A horn that produces at least IOO-db. sound pressure level isused as an internal alarm indicating device. Two outputs from the systemare used for remotely located alarm indicating devices. One output is arelay controlled outlet providing 1 17 volts AC at 600 watts. The secondoutput is a set of normally open or normally closed dry relay contactswhich carry current up to 1 amp.

Various combinations of the alarm module outputs can be selected by theswitching circuitry incorporated in the equipment. The function selectorenables the output or combination of outputs as selected. When an alarmtrigger signal occurs, the outputs that are enabled will then beactuated; the outputs remain actuated until the system is reset or untila complete loss of power occurs.

The system has two basic alarm trigger inputs. Triggering input A causesall logic and timing functions to act normally and causes the outputreaction to be that established by the function selector. Input B,referred to as the instant alarm input, bypasses all timing functionsand function selection; a trigger at input 8 causes all outputs to beactuated instantaneously regardless of control positions.

Provisions are made in the system to accept three kinds of internalmodules or sensors, which are a heat sensor, an ultrasonic intruderdetector module, and a radiofrequency receiver module. All low-voltageinputs and outputs of the system are located on terminal strips mountedon the rear of the modules. ll7-Volt AC 60-cycle power or internalrechargeable battery power operates the system which is always readyirrespective of external power distribution systems or switches.

The internal ultrasonic intruder detection system is connected to thefirst triggering input channel to employ all logic and timing functions.Preferably a system is used such as described in copending applicationUltrasonic Detection System, filed Mar. 10, 1969, by C. H. Peterson'andC. C. Krueger, is used. An internal radio receiver is connected to thesame triggering input channel as the ultrasonic intruder detectionsystem. Alternatively, the receiver may be connected to the immediateresponse input channel. When the receiver is keyed by radiofrequencywithin its sensitivity, logic and timing functions of the controlcircuit are set into operation. One or more radiofrequency transmittersmay be located at convenient locations remote from the alarm control.The transmitters may be operated by buttons depressed by persons whowish to set off the alarm control, or the transmitters may be controlledby remote perimeter metering devices such as black light photoelectriccells, contact or broken circuit sensitive devices. The transmitters maybe connected to heat or flame sensitive devices to provide an alarmsystem with remote wireless fire detection stations. Transmitters may beused with any automatic monitoring systems. Personally carriedtransmitters may be connected to battery operated health conditionmonitors.

Each input circuit is provided with external connection jacks terminalsso that any external detector may be wired to the alarm control and mayactivate its immediate response total signal mode or its programmedresponse mode. Any condition monitor may be connected to either input.The alarm system may be wired to remote panic button stations or to anycondition monitor.

Very little power is used in standby operation when AC power is off. Theequipment runs for an extended period when the internal battery poweroperates the system. When AC power is applied to the system, the batteryis charged. If the AC power supply fails, the internal battery isautomatically switched in and continues to supply power to all themodule circuits except the AC outlet.

One objective of this invention is the provision of alarm controlsystems with function selector means for individually and collectivelyenabling signaling means to respond to intruders, fire or other energyproducing inputs.

This invention has as another objective the provision of alarm controlsystems which have first and second input channels from sensing means sothat sensing means on one channel may operate through a logic controlsystem to control the operation of signaling devices and so that energysensing means on a second channel may directly operate the signalingdevices, bypassing the logic control circuit.

Another objective of this invention is the provision of alarm controlapparatus with bistable flip-flop circuits for remaining in an alarmstate until intentionally reset.

Another objective of this invention is the provision of alarm controlsystems having time delay means for operation of localized signals inresponse to circuit tripping and for immediate operation of remotesignals in response to the same tripping and for selection of local andremote signals.

A further objective of this invention is the provision of time delayreset means so that alarm control apparatus may not be deenergizedbefore it has responded to a triggering for a predetermined time.

These and further objectives of the invention will be apparent from thisdisclosure which includes the specification which is the writtenmaterial, including the claims, and from the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram ofthe interrelationship of elements of the invention.

FIG. 2 is a schematic diagram of the electrical components of apreferred embodiment for carrying out the objectives of this invention.

DETAILED DESCRIPTION OF THE DRAWINGS A reference to the functional blockdiagram FIG. I will aid in understanding the following description.Multiple numbers, for example l-20 refer to elements having those andintermediate numbers in FIG. 2. The equipment is comprised of majorcircuit sections, which are identified in the drawings as flip-flop10-20, AC outlet relay 6A, remote output relay 7A, adjustable delaytimer 22-30, horn relay 36A, function selector 50, input A, input B,reset delay 43-45, and power supply 51-69. The power supply is connectedto all other sections; therefore, for clarity in understanding theinterrelation of other sections, the power supply connections are notshown in the schematic FIG. 1.

FLIP-FLOP Every input to the system is first fed to the bistableflip-flop 10-20; the reset command signal is also fed to this stage.This logic element has two stable states. An alarm trigger signal fromany input causes the flip-flop to set and remain in the alarm state eventhough the alarm trigger may be momentary. The flip-flop remains in thealarmed state until a reset pulse occurs and causes the flip-flop toassume its original no alarm state. The remainder of the systemtherefore, reads out the state of the flip-flop and acts accordingly.Both outputs of this logic element are used to drive the circuitry thatfollows.

AC OUTLET RELAY I l7-volt AC power is applied to the AC outlet when theAC outlet relay contacts close. A transistor switch 9 acts as the relaycoil driver. When the flip-flop 10-20 is in the alarm state, a relaydriver transistor 9 switches on and connects one side of the AC outletrelay coil 6A to 8+. The other side of the relay coil is connected tothe function selector 50. If the function selector has not been set toenable this relay, an open circuit is presented to the relay, and, therelay is not energized. If the function selector has enabled this relay,the relay circuit completes causing the relay to be energized.

REMOTE OUTPUT RELAY One side of the remote output relay coil 7A isconnected to the same relay driver transistor 9 as the AC outlet relay6A. The remote output relay functions identically to the relay describedin the above paragraph; its coil current is enabled or disabled by thefunction selector 50. A form C relay contact arrangement 78 (FIG. 2) isused to provide both a normally open and normally closed set of relaycontact outputs.

ADJUSTABLE DELAY TIMER An adjustable delay timer 22-30 is actuated bythe other output of the flip-flop 10-20. When an alarm state occurs inthe flip-flop the timer circuit begins to time. A variable potentiometermakes the time delay adjustable from a small fraction of a second to atleast 10 seconds. The output of the timer remains in the no alarm stateuntil the time period, as set by the control, is reached. At that timethe output of the timer switches to the alarm state. The delayed alarmsignal is fed to the horn relay 36A only; therefore, the timer isreferred to as the Horn Time Delay Control.

HORN RELAY-FLASHER DC current to the horn is switched on and off by thehorn relay contacts. When an alarm signal output occurs from theadjustable delay timer, the horn relay 36A is energized. An electronichorn relay circuit 32-41 associated with the horn relay causes the relaycurrent to be interrupted at time intervals and durations established bythe electronic circuit. The acoustical output of the horn, therefore, isnot continuous but is a beeping sound. As before, if the functionselector has not been set to enable the horn relay, no current flowsthrough the horn relay coil, and no horn output occurs.

FUNCTION SELECTOR The function selector switch 50 has four positions,which are: AC outlet only; AC and horn; AC, horn, and remote output; andremote output only. A diode matrix in conjunction with a single polerotary switch are used to enable the combinations of outputs.

INPUT A Input A of the flip-flop 10-20 is a normally open input. Whenany alarm sensor is connected to this input and exhibits a closecircuit, the flip-flop is set in the alarmed state. Even if the inputreverts back to an open circuit condition almost instantaneously, theflip-flop remains in the alarm state. Because Input A is a normally opencircuit configuration, an infinite number of alarm sensors can beconnected in parallel to this input. If any one of these alarm sensorcircuits close, the alarm trigger and timing functions commenceimmediately. Maximum current flow in this circuit is 2 milliamperes.

INPUT B Input B, the instant alarm mode input, incorporates a diodematrix circuit to actuate the flip-flop, horn relay driver, and functionselector simultaneously. The multiple actuation causes the flip-flop tobe set, bypasses the horn time delay circuit, and enables all relayoutput functions, regardless of the setting of the function selectorswitch.

As long as Input B remains a closed circuit all functions are actuatedinstantaneously. If lnput Circuit B reverts to an open circuit at alater time, the output functions that are not selected or enabled by thefunction selector switch, are shut off, and only those functionsselected by the selector switch remain in alarm condition.

RESET When either Input A or Input B is a closed circuit, it isimpossible to reset the flip-flop. The system, therefore, remains in thealarmed state until Input A and/or B is cleared.

RESET DELAY Assuming Input A and B are clear, the system cannot be resetuntil 5 seconds after the horn relay driver circuit 32-41 has beenactuated. This holds true regardless of the position of the functionselector switch. If the horn is enabled, after the horn time delayperiod has passed, the horn sounds and continues sounding for a periodof 5 seconds even though the reset button has been depressed for thewhole duration. It is therefore impossible to disable the alarm controlmodule from sensing an alarm condition and from actuating the selectedalarm output.

POWER SUPPLY I l7-volt AC power is converted to l8-volt DC in the powersupply section 51-69. DC power is supplied to all active sections ofcircuitry as well as to the trickle charging circuit for the nickelcadmium standby battery pack. A solid state switching circuitautomatically connects the battery into the circuit in the event of ACpower loss. In the latter mode of operation there is a 12-volt nominalBrivoltage. All logic and timing functions operate identically at eithera standby l2-volt voltage or the normal l8-volt voltage. There are twomeans for identifying on which power mode the equipment is functioning.A pilot lump indicates when AC power is applied to the equipment. A darkpilot light indicates a loss of AC power or that the AC power switch onthe rear of the module is in the off position. There is also anoticeable difference in pitch of the audible horn signal, a pure toneindicating standby battery operation.

The power supply also supplies DC power to the internal RF receivermodule and the internal ultrasonic intruder detector module. Since theinternal heat sensor and the remote accessories connected to the remoteinput terminals are'all passive devices, they do not require power.Under no alarm conditions, the power consumption is very minimal,allowing at least 8 hours of standby power operation. When the system isin the alarmed condition, the power consumption is dependent on thenumber of functions that are enabled. If the horn is actuated in standbybattery mode of operation, 5 to 30 minutes of horn operation isavailable, depending on the duration of AC power loss before the hornwas actuated. When a standby battery pack has been completelydischarged, 16 hours of AC operation is required to fully recharge thebat tery.

DETAILED CIRCUIT DESCRIPTION In FIG. 2, components utilized for thecircuitry herein described are designated by numbers. Letterdesignations are used to indicate connecting points to conventionalassociated circuitry or electronic components, which, because they areconventional are not described in full detail. The detailed circuitdescription of FIG. 2 fully describes all parts associated with thealarm control module. The total system is a completely effectiveself-contained system without the use of accessory equipment. However,accessory alarm sensors or remote alarm indicating systems can beconnected to this system to further improve its effectiveness andversatility.

ALARM INPUT A AND INPUT B Input terminals C and L are connected to theinput of the flip-flop through resistor 12. Resistor l2 and capacitor 5serve as an RF filter network to suppress any radiofrequency currentsthat may exist on their respective connecting wires. Diode l connectsInput Terminals A and O to the input of the flip-flop circuit. TerminalsB, D, K and N serve as the ground return for each of the four inputterminals aforementioned. When a closed circuit condition exists betweeneither Terminals A and C or L and O and circuit ground, a low-resistanceground will be exhibited at the base of Transistor l9. Normally ontransistor 19 in the flip-flop circuit will, therefore, be shut off bythat input circuit condition.

ALARM VOLTAGE INPUT Terminal R connects to the alarm output of theultrasonic intruder detector module. The output of that module is a DCvoltage proportional to the amount of motion that the detector senses.Resistors 72 and 71 and transistor 73 comprise a DC threshold transistorswitch. When a certain DC level has been exceeded at terminal R,transistor 73 will switch on, causing a low-resistance condition betweencollector and emitter connections of transistor 73. This DC thresholdswitching action also causes a low resistance to ground condition at theinput of the flip-flop circuit.

BISTABLE MEMORY The system described herein has incorporated a flip-flopcircuit design for normally open alarm circuits. The particular designtechniques utilized cause the flip-flop to always come on in the samestate. When a closed circuit exists on its input, the flip-flop changesstate. The flip-flop remains latched in that state until it is reset bythe use of a separate signal. With slight modification, the same designis extended to include both normally open and normally closed inputcircuits simultaneously. Elements 10 through 21 comprise the componentsused in the flip-flop circuit. Resistors 10 and 11 serve as thecollector load resistors for transistor 15, the normally off transistorof the flip-flop. Resistors 13 and to serve as the cross couplingimpedances from each collector to each other's base. Resistor M inconjunction with resistor 13 determine the voltage thresholdcharacteristics of transistor 15. Resistor l7 and resistor 18 inconjunction with resistor 16 determine the voltage thresholdcharacteristics of transistor 19. Resistor 20 serves as the collectormode resistor for transistor 19. By intentionally making the resistanceof resistor 20 much larger than that of resistors 10, and I1, transistor19 saturates more easily than transistor 15. It is for this reason thattransistor 19 is always the on transistor in the normal state. Sincetransistors 15 and 19 are cross coupled, the states of each are alwaysopposite each other. Therefore, one or the other is on, and one or theother is off. This action causes current to flow always through diode21. The voltage drop across diode 21 remains essentially constant andserves as back-bias to transistors 15 and 1 .9, ensuring that the offtransistor is definitely ofl". Although the flip-flop shown herein byway of example is designed for circuit closing alarm sensors,conventional modification makes the flip-flop suitable for use withcircuit opening alarm sensors.

RELAY DRIVER When an alarm signal triggers the flip-flop, transistor 9turns on due to current flow through resistor 11 and transistor 15 ofthe flip-flop. Relay coils 6A and 7A are connected to the collector oftransistor 9. Therefore, one side of each of the relay coils is now at apositive potential. When the other side of either of these coils isgrounded, that coil is energized. The position of function selectorswitch 50 determines whether or not either of these relays are grounded,enabling either or both of them to be energized when the alann triggeroccurs.

RELAY 6 AND RELAY 7 Relay contacts 68 and 7B are shown in thedeenergized state. When coil 6A is energized, contacts 68 close,applying l20-volt AC power to AC outlet IJ. When relay coil 7A isenergized, contacts 78 switch from position 1 to position 2, causingoutput terminals E and F to change to an open circuit and outputterminals G and H to present a closed circuit. Remote alarm controlapparatus connected to either of those output terminal pairs sense thechange of state and actuate their particular alarm modes. Diode 8protects transistor 9 from any inductive kickback surges from relaycoils 6A or 7A.

HORN DELAY TIMER It is normally very difficult to design a circuit witha time delay range ratio as high as the circuit designed in this systemand to maintain a linear time scale on the time delay adjustmentcontrol. The time delay circuit of the present invention resets itselfinstantaneously and can immediately resume the same timing cycle with avery small amount of error. Circuit components 22 through 30 serve asthe adjustable delay timer. Normally capacitor 24 is grounded throughresistor 23, diode 22, and flip-flop transistor 19. Adjustable resistor30 and resistors 29 and 28 serve as a variable voltage bias network inthe emitter circuit of transistor 26. Transistor 26 is normally off,since the emitter voltage is higher than the base voltage in the noalarm state. When an alarm trigger occurs, transistor 19 shuts off,causing diode 22 to reverse bias, thereby ungrounding capacitor 24,which begins to charge towards B+ through resistor 25. When its basevoltage exceeds its emitter voltage by 0.6 volts, transistor 26 turnson. If variable resistor 30 is set at maximum resistance, the greatestamount of voltage exists at the emitter of transistor 26. That conditionestablishes the maximum time delay as established by the RC product ofresistor 25 and capacitor 24. At that time, capacitor 24 will haveaccumulated enough charge so that its potential is higher than theemitter potential, and transistor 26 turns on. The delayed alarm triggersignal, therefore, is located across resistor 27. The time delay can bevaried between minimum and maximum limits established by the variationof emitter potential on transistor 26.

HORN RELAY CIRCUIT Elements 32 through 41 comprise the horn relaycircuit. Resistor 32 establishes the base current flow for transistor33. When an alarm signal exists at the output of the adjustable horndelay timer circuit, transistor 33 is turned on causing the collectorpotential of transistor 33 to raise from zero to 13+ voltage. Diode 34couples this plus voltage to the horn flashing circuit. The simpleelectronic circuit used in conjunction with the horn relay coil causes aflasher action. The flashing rate and flashing duration is easilyadjustable and can be varied over a wide range. The power consumption isvery minimal when compared to standard flasher devices that typicallywork on a thermal heating effect of a bimetallic contact arrangement.There is an order of magnitude improvement in the consistency of thetiming factors under the conditions of varying supply voltage ascompared to the typical thermal flasher unit. Transistor 38, resistors37 and 40, capacitor 39 and unijunction transistor 41 comprise anelectronic multivibrator circuit, causing relay coil 36A to be energizedand deenergized at a predetermined rate. Relay contacts 368 close andopen, respectively causing horn 74 to be energized and deenergized. RCproduct of resistor 40 and capacitor 39 determine the on time of themultivibrator circuit. Diode 35 protects transistor 38 from inductivekickback voltages from relay coil 36A. The relay circuit can beenergized only when it is connected to ground. This again depends on theposition of function selector switch 50.

FUNCTION SELECTOR Function selection used in this apparatus eliminatesthe use of a complex multiple-pole selector switch. The combination ofdiodes and a one-pole switch yields an extremely simple solution to atypically difficult problem. There is a suitable diode configuration forany combination of functions that one desires to be able to select.Function selector switch 50 enables relays 6A, 7A and 36A in thefollowing manner. In position 1 relay 6A is grounded, and relays 7A and36A are ungrounded due to diode 47 being back-biased. In position 2relay 36A grounds directly, relay 6A grounds through diode 47 beingforward biased, and relay 7A remains ungrounded due to diode 48 beingback-biased. In position 3 relays 6A, 7A and 36A are grounded due todiodes 47, 48 and 49 forward conducting. In position 4 relay 7A groundsdirectly, and relays 6A and 36A are ungrounded due to diode 49 beingbackbiascd. The function selector, therefore, allows variouscombinations of events to occur when the alarm system has beentriggered.

INSTANT ALARM CIRCUIT Diode matrixes of the function switch and Input Bproduce an all-function enabling override regardless of switch position.This second logic loop forms the basis for many of the unique featuresand functions that are displayed in this equipments design. This sectionof circuitry also overrides the adjustable time delay circuit function.Circuit components 31, 2, 3 and 4 cause an overriding chain of events tooccur. Resistor 31 maintains input terminal A at a positive potential,back biasing diodes l, 2 and 4 to maintain an out of circuit condition.When a closed circuit exists between terminals A and B or terminals Nand O, voltage at A drops to zero, causing diodes l, 2 and 4 to conduct.Since the anode of diode 4 is connected to position 3 of functionselector switch 50, relays 6A, 7A and 36A are effectively grounded. Theconduction of diode 1 causes the flip-flop to be triggered to thealarmed state. Therefore, relay 6A and 7A are instantly energized,regardless of the position of function switch 50. The conduction ofdiode 2 causes the emitter potential of transistor 26 to be dropped toclose to zero volts, which supercedes any preset timing delay voltage inthe circuit; the horn relay circuit is energized instantaneously. Relay36A also is energized instantaneously due to the fact that it groundsthrough diode 4, regardless of the position of function switch 50. Theinstant alarm input, therefore,

triggers all output circuits as long as a closed circuit exists at theinput terminals. When an open circuit condition is reestablished, theoutput circuits that remain energized will be determined by the positionof function selector switch 50. The flip-flop is still in the alarmedstate.

RESET CIRCUIT The present method of reset timing does not allow thesystem to become completely disarmed. An alarm output will always occurfor at least 5 seconds for any trigger caused by any sensor that isconnected to the input of the system. There is no need to incorporatekeylock switches and other such devices in order to provide a securesystem.

The flip-flop remains in the alarmed state irregardless of which inputcircuit has triggered it; the trigger can be of a momentary orcontinuous nature depending on the source. A means of resetting theflip-flop must be provided. Two conditions must exist before theflip-flop can be reset; a specific time interval must exist after thehorn circuit has been energized, and all input circuits must be cleared.Components 43, 44 and 45 act as a timing pulse circuit, determining thetime interval before the flip-flop can be reset. When the horn circuithas been energized, capacitor 44, begins to charge through resistor 43.The voltage versus time relationship established by this RC productdetermines the amount of time delay. Unijunction transistor 45 does notfire until reset switch 46 has been depressed. Even if reset switch 46is depressed before or at the time of alarm trigger, a reset pulse isnot generated until capacitor 44 charges to the firing potential ofunijunction transistor 45. At that time a positive pulse will appear atthe base of flip-flop transistor 19, causing the flip-flop to be resetto its original state, with transistor 19 in the on condition.

AC PRIMARY CIRCUIT Reference 51 connects to -volt AC 60-cycle powersource; the third wire represents the equipment ground return. Switch 53acts as the AC power on and off switch. Fuse 54 will open circuit due tofault currents in either transformer 58 of AC outlet IJ. This protectsall internal wiring as well as relay contacts 68 against an over currentsituation. Resistors 55, 56, and neon lamp 57 are used to indicate whenAC power is applied to the electronic circuitry. With l20-volt ACapplied across the primary of transformer 58A, a voltage stepdown to 12volts AC occurs at secondary 588. Secondary AC voltage is rectified bydiodes 59, 60, 61 and 62 to produce a DC output voltage of approximately19 volts. Capacitors 63, 64 and 65 filter out AC ripple from therectification process to produce an acceptable pure DC voltage, referredto as B+ voltage. B+ voltage is fed to all active circuits contained inthe alarm control module and is fed to terminals Q and S to supply powerto auxiliary equipments.

INTERNAL STANDBY POWER Elements 66 through 69 comprise the internalstandby battery power system. Switch 68 connects or disconnects battery69 from the circuitry. It also connects or disconnects the B+ voltage toterminals which feed DC power to auxiliary equipment. Battery 69 is anickel cadmium battery capable of being charged and discharged manytimes. With switch 68 on, resistor 67 determines the trickle chargecurrent. Diode 66 is back-biased when AC power is applied; therefore,the rectified AC supplies all circuit power, and battery 69 iseffectively disconnected from the circuit and is in a trickle chargingmode. When AC power fails, B+ voltage begins to drop. When it drops 0.6volts below the battery voltage, diode 66 conducts and automaticallyconnects battery 69 to the B+ line, allowing the battery to supplyuninterrupted power to the electronic circuitry. The intentional voltagedifference between the two sources of DC power allows the standby powerswitchover arrangement to be utilized.

DC ClRCUlT TO ULTRASONIC MODULE Switch 70 when closed applies thebattery voltage to terminal P to enable and supply standby power to theultrasonic intruder detector module. When switch 70 is opened or in theoff position, the ultrasonic intruder detector module is disabled ordisarm'ed and, therefore, is not capable of triggering the alarm controlmodule, irregardless of the positions of switch 68 or 53.

Switches 53 and 68, being in the off position, disarms the completesystem. All alarm inputs are armed when either switch 53 or switch 68 inon.

That which is claimed is:

ljAlarm control apparatus comprising:

energy sensing input means,

control circuit means connected to the energy sensing input means,

power source connected to thecontrol circuit means,

more than one signalling means connected to the control circuit means,

function selector means connected to each signalling means separatelyfrom the control circuit means for individually and I collectivelyenabling the signalling means for response to the energy sensing meansand control means.

2. The alarm control apparatus of claim 1 wherein the energy sensinginput means comprises first and second energy sensing input means, andwherein the secondenergy sensing input means is connected to thesignalling means, whereby the signalling means operates in response tothe control circuit means in response to energy sensing by the firstinput means, and whereby the signalling means directly operate inresponse to energy sensing by the second input means.

3. The alarm control apparatus of claim 2 wherein the energy sensinginput means comprises first and second energy sensing input means, andwherein the second input means is connected to the function selectormeans for selectively enabling the signalling means in responseto energysensing by the second input means.

4. The alarm control apparatus of claim 3 wherein the first energysensing input means comprises an ultrasonic intruder detector means andwherein the second energy sensing input means comprises heat sensormeans.

5. The alarm control apparatus of claim 4 wherein the first energysensing means additionally comprises a radiofrequency receiver andconnection means for remote accessories, and wherein the second inputmeans further comprises second connections for remote accessories.

6. The alarm control apparatus of claim 1 wherein the control circuitcomprises a bistable flip-flop circuit connected to the energy sensinginput means.

7. The alarm control apparatus of claim 6 wherein the control circuitmeans further comprises relay driver means connected to the flip-flopmeans and signal relay means connected to the relay driver means forcontrolling the signalling means.

8. The alarm control apparatus of claim 7 wherein the control circuitmeans further comprises adjustable delayed timer means interposedbetween the flip-flop circuit and the relay driver means, a reset switchmeans connected to the flip-flop means and reset delay means connectedbetween the relay driver means and the reset switch means for delayingresetting of flip-flop to a no alarm condition.

9. The apparatus of claim 1 wherein the control circuit means includetime delay apparatus comprising a first normally on transistor having anemitter connected to ground, a diode connected to a collector of thefirst transistor, a capacitor connected between the diode and ground, afirst resistor connected between the capacitor and a source of DC powerwhereby the capacitor is charged through the first resistor when thefirst transistor is 01?, a second transistor having a base connected tothe capacitor and having an emitter-collector circuit connected to asource of power and to an alarm response circuit for operating the alarmresponse circuit when the second transistor is conductive, an emitter ofthe second transistor being connected through second resistor to asource of power and through a potentiometer to ground whereby theemitter is held at a voltage higher than the'base when the capacitor isgrounded through the first transistor, and whereby adjusting thepotentiometer controls the time required after the first transistor hasbeen turned off for the capacitor to charge sufiiciently toturn thesecond transistor on thereby completing circuit means b etween the powersource and a signalling means. i I

1 0. The apparatus of claim 1' wherein the function sel ectbr meansincludes a function selector switch for selectively connecting a singlemovable pole to first,second and third connecting lines which areconnected to respective signalling means contacts comprising: a movablepole, a first contact connected to a first line, a second contactconnected'to the second line and connected via a unidirectional elementto the first line, a third contact connected to the 'thirdline, andafourth contact connected to the third contact via a unidirectionalelement and connected to the second contact via a unidirectionalelement, whereby thefirst contact provides a pole contact for the firstvline, the second contact provides a pole contact for first and secondlines, the third contact provides ground contact for the third line andthefourth contact provides pole contact for first, second and thirdlines.

11. The apparatus of claim 1 wherein the control circuit means includesa reset time delay comprising a unijunction transistor connected to asource of power and to an alarm reset switch which is in turn connectedto a flip-flop circuit, a unijunction transistor having a biasingconnection connected to a capacitor which is grounded on one sidethereof and which is connected through a resistance to the output of atime delay relay, whereby closing the alarm reset switch after the timedelay relay has become energized charges the capacitor through theresistance to a potential required to make the unijunction transistorconductive enabling resetting of the control circuit means after a timedelay.

12. An alarm control system comprising first and secondenergy sensinginput means,

controlcircuit means connected to the energy sensing input means,

signalling means connected to the control circuit means and to thesecond energy sensing means for controlled response to the energysensing of the first input means and for direct response to energysensing by the second input means,

function selector means connected to the signalling means separatelyfrom the control circuit means for severally enabling the signallingmeans for response to the sensing means and control means, and

power source means connected to the control circuit means and to thesignalling means.

13. The alarm control system of claim 12 wherein the second energysensing input means is connected to the function selector means foroverriding the function selector means and enabling all signalling meansfor response to energy sensing in the second input means.

14. The alarm control system of claim 13 wherein the control circuitmeans comprises a bistable flip-flop connected to the first and secondenergy sensing input means,

an adjustable delay timer connected to the bistable flip-flop,

first and second relay drivers respectively connected to the flip-flopand to the adjustable delay timer,

an AC outlet relay and a remote output relay connected to the firstrelay driver,

a horn relay connected to the second relay driver,

a reset delay and reset switch connected between the second relay driverand the flip-flop for resetting the flipflop after a time delay,

and wherein the function selector is connected to the AC outlet relay,to the remote output relay, and to the horn relay, whereby the functionselector may select either AC outlet control, AC outlet control and hornoperation, AC outlet control, horn operation and remote output, orremote output,

and wherein the second energy sensing input means is connected to theflip-flop, to the second relay driver and to the function selector foroverriding the function selector and operating all of the signallingmeans in response to the energy sensing by the second input means.

15. A self-contained alarm system for sensing the presence of intrudersor of excessive heat and for responding by a selfcontained alarm device,comprising a power source having a cord and plug for connection to aconventional ll-volt AC input source and having transformer andrectifier means for producing a relatively low DC voltage from the ACinput voltage, multiple signal means connected to the power source, anultrasonic intruder sensor connected to the power source, a fire sensorhaving a heat sensitive switch connected to the power source, aradiofrequency sensor, an alarm control circuit connected to the firesensor, to the ultrasonic intruder sensor and to the radiofrequencysensor and to the signal means and function selector means connected tothe signalling means independently of the control circuit, for operatinga signal means in response to an input from the sensors.

16. The method of controlling alarms comprising connecting conditionsensors to two input channels, connecting the input channels to abistable flip-flop circuit, changing state of the bistable flip-flop inresponse to condition sensing by one of the sensors, connecting a powersource to a first set of relay coils in response to changing of state ofthe flip-flop, beginning operation of a time delay circuit in responseto changing of state of the flip-flop, connecting the power source to arelay for operating the local signal in response to completion of thetime delay circuit and selectively grounding any or all of the relayspreparatory to the changing of state of the flip-flop device, wherebyselected relays are enabled for causing operation of relay switches inresponse to changing of state of the flip-flop device.

17. The method of claim 16 further comprising overriding the time delayand function selector and actuating all signals when input is receivedon a selected one of the input channels.

18. The method of claim 18 wherein the beginning operation of a timedelay circuit comprises the sequential steps of biasing a firsttransistor off by providing an emitter potential higher than a basepotential, shorting a capacitor connected to the transistor base,unshorting the capacitor upon a start signal, slowly charging thecapacitor to a potential above emitter potential, thereby causing thetransistor to turn on completing an alarm circuit and controlling timedelay by varying emitter potential.

1. Alarm control apparatus comprising: energy sensing input means,control circuit means connected to the energy sensing input means, powersource connected to the control circuit means, more than one signallingmeans connected to the control circuit means, function selector meansconnected to each signalling means separately from the control circuitmeans for individually and collectively enabling the signalling meansfor response to the energy sensing means and control means.
 2. The alarmcontrol apparatus of claim 1 wherein the energy sensing input meanscomprises first and second energy sensing input means, and wherein thesecond energy sensing input means is connected to the signalling means,whereby the signalling means operates in response to the control circuitmeans in response to energy sensing by the first input means, andwhereby the signalling means directly operate in response to energysensing by the second input means.
 3. The alarm control apparatus ofclaim 2 wherein the energy sensing input means comprises first andsecond energy sensing input means, and wherein the second input means isconnected to the function selector means for selectively enabling thesignalling means in response to energy sensing by the second inputmeans.
 4. The alarm control apparatus of claim 3 wherein the firstenergy sensing input means comprises an ultrasonic intruder detectormeans and wherein the second energy sensing input means comprises heatsensor means.
 5. The alarm control apparatus of claim 4 wherein thefirst energy sensing means additionally comprises a radiofrequenCyreceiver and connection means for remote accessories, and wherein thesecond input means further comprises second connections for remoteaccessories.
 6. The alarm control apparatus of claim 1 wherein thecontrol circuit comprises a bistable flip-flop circuit connected to theenergy sensing input means.
 7. The alarm control apparatus of claim 6wherein the control circuit means further comprises relay driver meansconnected to the flip-flop means and signal relay means connected to therelay driver means for controlling the signalling means.
 8. The alarmcontrol apparatus of claim 7 wherein the control circuit means furthercomprises adjustable delayed timer means interposed between theflip-flop circuit and the relay driver means, a reset switch meansconnected to the flip-flop means and reset delay means connected betweenthe relay driver means and the reset switch means for delaying resettingof flip-flop to a no alarm condition.
 9. The apparatus of claim 1wherein the control circuit means include time delay apparatuscomprising a first normally on transistor having an emitter connected toground, a diode connected to a collector of the first transistor, acapacitor connected between the diode and ground, a first resistorconnected between the capacitor and a source of DC power whereby thecapacitor is charged through the first resistor when the firsttransistor is off, a second transistor having a base connected to thecapacitor and having an emitter-collector circuit connected to a sourceof power and to an alarm response circuit for operating the alarmresponse circuit when the second transistor is conductive, an emitter ofthe second transistor being connected through second resistor to asource of power and through a potentiometer to ground whereby theemitter is held at a voltage higher than the base when the capacitor isgrounded through the first transistor, and whereby adjusting thepotentiometer controls the time required after the first transistor hasbeen turned off for the capacitor to charge sufficiently to turn thesecond transistor on thereby completing circuit means between the powersource and a signalling means.
 10. The apparatus of claim 1 wherein thefunction selector means includes a function selector switch forselectively connecting a single movable pole to first, second and thirdconnecting lines which are connected to respective signalling meanscontacts comprising: a movable pole, a first contact connected to afirst line, a second contact connected to the second line and connectedvia a unidirectional element to the first line, a third contactconnected to the third line, and a fourth contact connected to the thirdcontact via a unidirectional element and connected to the second contactvia a unidirectional element, whereby the first contact provides a polecontact for the first line, the second contact provides a pole contactfor first and second lines, the third contact provides ground contactfor the third line and the fourth contact provides pole contact forfirst, second and third lines.
 11. The apparatus of claim 1 wherein thecontrol circuit means includes a reset time delay comprising aunijunction transistor connected to a source of power and to an alarmreset switch which is in turn connected to a flip-flop circuit, aunijunction transistor having a biasing connection connected to acapacitor which is grounded on one side thereof and which is connectedthrough a resistance to the output of a time delay relay, wherebyclosing the alarm reset switch after the time delay relay has becomeenergized charges the capacitor through the resistance to a potentialrequired to make the unijunction transistor conductive enablingresetting of the control circuit means after a time delay.
 12. An alarmcontrol system comprising first and second energy sensing input means,control circuit means connected to the energy sensing input means,signalling means connected to the control circuit means and to thesecond energy sensing means for controlled response to the energysensing of the first input means and for direct response to energysensing by the second input means, function selector means connected tothe signalling means separately from the control circuit means forseverally enabling the signalling means for response to the sensingmeans and control means, and power source means connected to the controlcircuit means and to the signalling means.
 13. The alarm control systemof claim 12 wherein the second energy sensing input means is connectedto the function selector means for overriding the function selectormeans and enabling all signalling means for response to energy sensingin the second input means.
 14. The alarm control system of claim 13wherein the control circuit means comprises a bistable flip-flopconnected to the first and second energy sensing input means, anadjustable delay timer connected to the bistable flip-flop, first andsecond relay drivers respectively connected to the flip-flop and to theadjustable delay timer, an AC outlet relay and a remote output relayconnected to the first relay driver, a horn relay connected to thesecond relay driver, a reset delay and reset switch connected betweenthe second relay driver and the flip-flop for resetting the flip-flopafter a time delay, and wherein the function selector is connected tothe AC outlet relay, to the remote output relay, and to the horn relay,whereby the function selector may select either AC outlet control, ACoutlet control and horn operation, AC outlet control, horn operation andremote output, or remote output, and wherein the second energy sensinginput means is connected to the flip-flop, to the second relay driverand to the function selector for overriding the function selector andoperating all of the signalling means in response to the energy sensingby the second input means.
 15. A self-contained alarm system for sensingthe presence of intruders or of excessive heat and for responding by aself-contained alarm device, comprising a power source having a cord andplug for connection to a conventional 110-volt AC input source andhaving transformer and rectifier means for producing a relatively low DCvoltage from the AC input voltage, multiple signal means connected tothe power source, an ultrasonic intruder sensor connected to the powersource, a fire sensor having a heat sensitive switch connected to thepower source, a radiofrequency sensor, an alarm control circuitconnected to the fire sensor, to the ultrasonic intruder sensor and tothe radiofrequency sensor and to the signal means and function selectormeans connected to the signalling means independently of the controlcircuit, for operating a signal means in response to an input from thesensors.
 16. The method of controlling alarms comprising connectingcondition sensors to two input channels, connecting the input channelsto a bistable flip-flop circuit, changing state of the bistableflip-flop in response to condition sensing by one of the sensors,connecting a power source to a first set of relay coils in response tochanging of state of the flip-flop, beginning operation of a time delaycircuit in response to changing of state of the flip-flop, connectingthe power source to a relay for operating the local signal in responseto completion of the time delay circuit and selectively grounding any orall of the relays preparatory to the changing of state of the flip-flopdevice, whereby selected relays are enabled for causing operation ofrelay switches in response to changing of state of the flip-flop device.17. The method of claim 16 further comprising overriding the time delayand function selector and actuating all signals when input is receivedon a selected one of the input channels.
 18. The method of claim 18wherein the beginning operation of a time delay circuit comprises thesequential steps of Biasing a first transistor off by providing anemitter potential higher than a base potential, shorting a capacitorconnected to the transistor base, unshorting the capacitor upon a startsignal, slowly charging the capacitor to a potential above emitterpotential, thereby causing the transistor to turn on completing an alarmcircuit and controlling time delay by varying emitter potential.